(19)
(11) EP 1 000 787 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.06.2002 Bulletin 2002/25

(43) Date of publication A2:
17.05.2000 Bulletin 2000/20

(21) Application number: 99120937.0

(22) Date of filing: 02.11.1999
(51) International Patent Classification (IPC)7: B60H 1/32, B60H 1/00, F25B 41/04
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 09.11.1998 JP 31786098

(71) Applicant: Denso Corporation
Kariya-city, Aichi-pref., 448-8661 (JP)

(72) Inventors:
  • Takano, Yoshiaki
    Kariya-shi, Aichi 448-8661 (JP)
  • Izawa, Satoshi
    Kariya-shi, Aichi 448-8661 (JP)
  • Yamanaka, Yasushi
    Kariya-shi, Aichi 448-8661 (JP)
  • Ito, Hajime
    Kariya-shi, Aichi 448-8661 (JP)

(74) Representative: Klingseisen, Franz, Dipl.-Ing. et al
Patentanwälte, Dr. F. Zumstein, Dipl.-Ing. F. Klingseisen, Postfach 10 15 61
80089 München
80089 München (DE)

   


(54) Vehicle refrigerating cycle apparatus and method for inhibiting cycle corrosion and for facilitating rapid passenger compartment warm-up during low temperature conditions


(57) A refrigerating cycle apparatus (20) that inhibits system corrosion and abnormally high pressure during startup of a first refrigerant circuit (21) by preventing air from penetrating into a refrigerant compressor during low-temperature startup of a second auxiliary refrigerant circuit (22). An apparatus evaporator (6) heats air flowing through an air conditioning duct (2) as a high temperature/high pressure gas refrigerant discharged from an engine-driven compressor (7) is guided through a pressure-reducing unit (29) and the evaporator (6), bypassing a condenser (25). Thereafter, the refrigerant is returned to the compressor (7), which is automatically stopped when a compressor suction pressure (PS), or a physical quantity representative of the suction pressure (PS), becomes lower than a predetermined value.






Search report